Cotton is an important economic crop in China, and the planting area is relatively wide. In the process of cotton planting, it is inevitable that some diseases will occur. In the face of these diseases, Xiaobian collected some prevention methods and shared them with everyone.
In the cultivation of cotton, cotton wilt and verticillium wilt are extremely harmful and devastating in cotton production. Once it occurs, a large number of dead seedlings are caused during the seedling stage, and the buds are largely shed at the adult stage, and the plants are dead and the losses are severe. Cotton wilt and verticillium wilt are systemic infective vascular bundle diseases, and their control methods are basically the same.
1. Strengthen seed quarantine. It is strictly forbidden to transfer cotton seeds, cottonseed cakes and cottonseed hulls from the ward.
2. Select resistant varieties. In the production of cotton, the disease-resistant varieties are selected to improve the disease resistance of the plants and control the occurrence of diseases.
3, the implementation of the rotation. Rotation of heavy disease fields can be carried out for 3 to 5 years with cereal crops such as wheat and corn.
4. Perform seed treatment. Good cotton soaking and seed dressing before sowing, eliminate the source of bacteria on the seeds, or use coated cotton.
5. Strengthen field management. Diligent ploughing, deep cultivating, raising ground temperature and reducing soil moisture. Ditch drainage to lower the water table. Add fertilized organic fertilizer and phosphorus and potassium fertilizer to avoid partial application of nitrogen fertilizer.
6. Do a good job of prevention before the bud. The bud stage of cotton is a key period for the occurrence and development of cotton blight and verticillium wilt. It can spray nutrients such as potassium dihydrogen phosphate, fulvic acid salt and green wind 95 before cotton plant symptoms to improve the disease resistance of cotton plants. Reduce the occurrence of diseases.
7, do a good job of remedial work after the onset. 1 After the sporadic diseased plants are found in the field, they should be immediately removed and burned, and the diseased spots and their surroundings should be disinfected. 2 Severe plots can be combined with spray and root irrigation. Use 3% Guangchangling water agent 300-500 times liquid, or 12.5% ​​cure atrophy 200-250 times liquid, add potassium dihydrogen phosphate, green wind 95 for spraying, spray once every 5-7 days, even spray 3 - 4 times. Rooting, 50-100ml per solution, can reduce the harm and control the spread of the disease. For unoccupied plots, foliar humic acid organic fertilizer or green wind 95, potassium dihydrogen phosphate and other foliar fertilizers should be sprayed to increase the disease resistance of cotton plants and reduce the incidence. Spray once every 7-10 days, even spray 2-3 Times.
More pesticide knowledge , please pay attention to China Pesticide Network
The blue green algae sensor uses the fluorescence method to measure the content of blue-green algae in the water. The 590nm light source excites the phycocyanin in the water to produce fluorescence, and the fluorescence intensity is measured at 650nm to calculate the number of blue-green algae in the water.Blue-green algae in water quality can reflect changes in water ecological environment. By monitoring the blue-green algae in the water quality, changes in the water ecological environment can be detected early, and corresponding protection measures can be taken to protect the stability and health of the water ecological environment. The protection level of the blue green algae sensor is IP68, the shell material is stainless steel, and the measurement range is 0-280000 cells/mL. The blue green algae sensor comes with a cleaning wiper, which can realize automatic cleaning underwater and reduce maintenance. You use this BGA sensor with our Blue Green Algae Controller to realize more functions.
blue green algae sensor, blue green algae probe,online BGA sensor
Suzhou Delfino Environmental Technology Co., Ltd. , https://www.daruifuno.com